Safety lock



FIG. 1 is a perspective view of a safety lock showing the claimed design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a partial enlarged view of FIG. 1 thereof.

The dashed broken lines depict portions of the safety lock that form no part of the claimed design. The dash-dot-dash lines depict the boundaries of the enlarged area shown in FIG. 9 and form no part of the claimed design. None of the broken lines form any part of the claimed design. 

CLAIM The ornamental design for a safety lock, as shown and described. 